Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!usc!elroy.jpl.nasa.gov!jpl-devvax!lwall
From: lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall)
Newsgroups: comp.lang.perl
Subject: Re: Perl Lint?
Message-ID: <10796@jpl-devvax.JPL.NASA.GOV>
Date: 19 Dec 90 01:00:43 GMT
References: <1990Dec18.003438.21694@uvaarpa.Virginia.EDU>
Reply-To: lwall@jpl-devvax.JPL.NASA.GOV (Larry Wall)
Organization: Jet Propulsion Laboratory, Pasadena, CA
Lines: 16

In article <1990Dec18.003438.21694@uvaarpa.Virginia.EDU> worley@compass.com writes:
: 
:    X-Name: Larry Wall
: 
:    You'd have to construct the entire call graph.  Probably not worth
:    it, given that () in a scalar context Does the Right Thing anyway.
: 
: OK, Larry, clue me in -- what does () in a scalar context do?  It's
: not in the manual.

It returns the same thing as any other list evaluated in a scalar context,
namely the last value.  This is because a list in a scalar context is treated
as a series of comma operators, as in C.  Of course, the last element of
a null list is undefined, so that's what you get for the return value.

Larry